A good day at BR rimfire
Posted: Fri Dec 25, 2009 12:09 am
A few weeks ago I went down to my local range for the rimfire benchrest comp.
I have to admit, I normally don’t take benchrest too competitively, but consider it to be a good way to learn wind doping, and checking out ammo for my other target shooting activities.
However, on this occasion, I decided to treat it a bit more seriously.
So I started a couple of days earlier, by weighing my ammunition. A brick of SK rifle match was weighed by the individual round, to the nearest 1/100th gram. The lightest came in at 3.32 (only 2 rounds), and the heaviest at 3.39 (3 rounds). Each round was wiped of wax before weighing.
For those that may be interested, I offer the following information of the weights, with the number of pellets and the percentage of the brick that number represented:
3.32g = 2 (0.6%)
3.33g = 37 (7.4%)
3.34g = 107 (21.4%)
3.35g = 155 (31%)
3.36g = 125 (25%)
3.37g = 55 (11%)
3.38 = 15 (3%)
3.39 = 3 (0.6%)
Okay, so that was the ammo sorted. I don’t have a rim gauge, so that wasn’t done, and I didn’t do a total overall length, as I’d had enough by the time I’d weighed all those rounds.
I took 2 boxes of the 3.35g went down to the range with me. I recalled Rinso’s advice about BR rimfire and a house brick, but left the house brick at home, and went the traditional way.
The Savage 900s was shooting well the last time it had been out, so the bore was left dirty. I sighted in, and it was all looking good.
I drew a bench with the current club champion on one side of me, and a previous one on the other. One set the club BR rimfire record, and the other had equaled it. I was in serious company by my standards.
So we shot the first 2 cards (fifty). I was very pleased with my first card (100.2), as it was the first 100 card I had shot, and turned out to be the only one on the day.
My second card at 50m let me down. A slight change in wind direction had me chasing it, and I blew it (92). However, I came back with a 93 and a 94 on the 100m targets as the breeze changed again, and ended up with a 379 total. And that was good enough on the day to sneak into second position. I was absolutely stoked. I learnt a heap about the wind on the range, and had a great day out.
Next stage is to try and get to the range on a dead calm day, and see what the difference is when I fire off the 3 lightest rounds compared to the 3 heaviest. I’m wondering just what the difference will be.
regards, curan
I have to admit, I normally don’t take benchrest too competitively, but consider it to be a good way to learn wind doping, and checking out ammo for my other target shooting activities.
However, on this occasion, I decided to treat it a bit more seriously.
So I started a couple of days earlier, by weighing my ammunition. A brick of SK rifle match was weighed by the individual round, to the nearest 1/100th gram. The lightest came in at 3.32 (only 2 rounds), and the heaviest at 3.39 (3 rounds). Each round was wiped of wax before weighing.
For those that may be interested, I offer the following information of the weights, with the number of pellets and the percentage of the brick that number represented:
3.32g = 2 (0.6%)
3.33g = 37 (7.4%)
3.34g = 107 (21.4%)
3.35g = 155 (31%)
3.36g = 125 (25%)
3.37g = 55 (11%)
3.38 = 15 (3%)
3.39 = 3 (0.6%)
Okay, so that was the ammo sorted. I don’t have a rim gauge, so that wasn’t done, and I didn’t do a total overall length, as I’d had enough by the time I’d weighed all those rounds.
I took 2 boxes of the 3.35g went down to the range with me. I recalled Rinso’s advice about BR rimfire and a house brick, but left the house brick at home, and went the traditional way.
The Savage 900s was shooting well the last time it had been out, so the bore was left dirty. I sighted in, and it was all looking good.
I drew a bench with the current club champion on one side of me, and a previous one on the other. One set the club BR rimfire record, and the other had equaled it. I was in serious company by my standards.
So we shot the first 2 cards (fifty). I was very pleased with my first card (100.2), as it was the first 100 card I had shot, and turned out to be the only one on the day.
- The first card at 50m.
Next stage is to try and get to the range on a dead calm day, and see what the difference is when I fire off the 3 lightest rounds compared to the 3 heaviest. I’m wondering just what the difference will be.
regards, curan